Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea83ae37c6e15ab8…

MALICIOUS

PDF

91.8 KB Created: 2021-06-27 09:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 905ab9a88f7989fed8f68ac03e464021 SHA-1: 5f11cec3b5beb07578b46dc53addbc8c64e40ab1 SHA-256: ea83ae37c6e15ab8ba0a079ce3130d57fac8555b7e39c8c0faa3eeef3e2f768c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The embedded URLs are likely intended to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/7mscuiev75nkbn58fdni7m3vkj/27096984140.pdf In PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b8f1f8321a7930ef3e7713e73b5db4c2/32554700786.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/2mu4tkres9uf54k7affiao0dvj/ribemoxu.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ussgnl0ja2k9qh4aq7t4j8jk4t/93157905012.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/kodujuxiwijexa.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/jejovabexufasa.pdfIn PDF document text
    • https://synersys.fr/contenu/file/tusadojarup.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/63229014266.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d88177f39---79454495595.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/pazerujijemavusinu.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/17773041075.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/likonimojanatividogoteb.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a98e6800---rulelekejujofalagusojuvuk.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be6d2f7cd96---minomivunuforofuve.pdfIn PDF document text
    • https://zlato-eu.sk/upload/files/fibisavogabopajex.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/30d7c4f6d0ea898e625c2d3f443f1369/tesukejopesodugipe.pdfIn PDF document text
    • https://airbays.com/userfiles/file/bisevoxejujeravira.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/gikijo.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac158ef08---vipapobolupotijavizato.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/46591425147.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90c0e6d2a7---rinufojonesuwox.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210626_31C5AE5F0DCEB245.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a675be25ee2---rekofalaforelufopod.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/42c2aa47b2a86eeeda1a76f200a3f19b/xerafenugatemofuban.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/gelevemelelaro.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bda2520b2---vabivoluzufariw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=master+of+accounting+cpa+extensionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 17296 bytes
SHA-256: 75f64c233eac8163439fda6ec98c196e451aaf9301f26c7c5c32855271ada6b5
font_01_sfnt_off00013091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13091 10804 bytes
SHA-256: 9918360e82f17ae9ca6ad45e83a899af4a3144493ba21d64106d32c8486da86e
font_02_sfnt_off000149ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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